Signature of a Pairing Transition in the Heat Capacity of Finite Nuclei
S. Liu, Y. Alhassid
Abstract
The heat capacity of iron isotopes is calculated within the interacting shell model using the complete (pf+0g9/2)-shell. We identify a signature of the pairing transition in the heat capacity that is correlated with the suppression of the number of spin-zero neutron pairs as the temperature increases. Our results are obtained by a novel method that significantly reduces the statistical errors in the heat capacity calculated by the shell model Monte Carlo approach. The Monte Carlo results are compared with finite-temperature Fermi gas and BCS calculations.
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